<template>
    <view
        :class="[styleType === 'text' ? 'segmented-control--text' : 'segmented-control--button']"
        :style="{ borderColor: styleType === 'text' ? '' : activeColor }"
        class="segmented-control"
    >
        <view
            v-for="(item, index) in values"
            :key="index"
            :class="[
                styleType === 'text' ? '' : 'segmented-control__item--button',
                index === 0 && styleType === 'button' ? 'segmented-control__item--button--first' : '',
                index === values.length - 1 && styleType === 'button' ? 'segmented-control__item--button--last' : ''
            ]"
            :style="{
                backgroundColor:
                    index === currentIndex && styleType === 'button'
                        ? activeColor
                        : styleType === 'button'
                          ? inActiveColor
                          : 'transparent',
                borderColor:
                    (index === currentIndex && styleType === 'text') || styleType === 'button'
                        ? activeColor
                        : inActiveColor
            }"
            class="segmented-control__item"
            @click="_onClick(index)"
        >
            <view>
                <text
                    :style="{
                        color:
                            index === currentIndex
                                ? styleType === 'text'
                                    ? activeColor
                                    : '#fff'
                                : styleType === 'text'
                                  ? '#000'
                                  : activeColor
                    }"
                    class="segmented-control__text"
                    :class="styleType === 'text' && index === currentIndex ? 'segmented-control__item--text' : ''"
                    >{{ item }}</text
                >
            </view>
        </view>
    </view>
</template>

<script>
/**
 * SegmentedControl 分段器
 * @description 用作不同视图的显示
 * @tutorial https://ext.dcloud.net.cn/plugin?id=54
 * @property {Number} current 当前选中的tab索引值，从0计数
 * @property {String} styleType = [button|text] 分段器样式类型
 * 	@value button 按钮类型
 * 	@value text 文字类型
 * @property {String} activeColor 选中的标签背景色与边框颜色
 * @property {String} inActiveColor 未选中的标签背景色与边框颜色
 * @property {Array} values 选项数组
 * @event {Function} clickItem 组件触发点击事件时触发，e={currentIndex}
 */

export default {
    name: "UniSegmentedControl",
    props: {
        current: {
            type: Number,
            default: 0
        },
        values: {
            type: Array,
            default() {
                return [];
            }
        },
        activeColor: {
            type: String,
            default: "#2979FF"
        },
        inActiveColor: {
            type: String,
            default: "transparent"
        },
        styleType: {
            type: String,
            default: "button"
        }
    },
    emits: ["clickItem"],
    data() {
        return {
            currentIndex: 0
        };
    },
    computed: {},
    watch: {
        current(val) {
            if (val !== this.currentIndex) {
                this.currentIndex = val;
            }
        }
    },
    created() {
        this.currentIndex = this.current;
    },
    methods: {
        _onClick(index) {
            if (this.currentIndex !== index) {
                this.currentIndex = index;
                this.$emit("clickItem", {
                    currentIndex: index
                });
            }
        }
    }
};
</script>

<style lang="scss" scoped>
.segmented-control {
    /* #ifndef APP-NVUE */
    display: flex;
    box-sizing: border-box;
    /* #endif */
    flex-direction: row;
    height: 36px;
    overflow: hidden;
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
}

.segmented-control__item {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    box-sizing: border-box;
    /* #endif */
    position: relative;
    flex: 1;
    justify-content: center;
    align-items: center;
}

.segmented-control__item--button {
    border-style: solid;
    border-top-width: 1px;
    border-bottom-width: 1px;
    border-right-width: 1px;
    border-left-width: 0;
}

.segmented-control__item--button--first {
    border-left-width: 1px;
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

.segmented-control__item--button--last {
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
}

.segmented-control__item--text {
    border-bottom-style: solid;
    border-bottom-width: 2px;
    padding: 6px 0;
}

.segmented-control__text {
    font-size: 14px;
    line-height: 20px;
    text-align: center;
}
</style>
